Home / 51,105.20-76,661.40-28,929.20

Finding the Fourth Proportional to 51,105.20, 76,661.40 and 28,929.20

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Solution

The fourth proportional to 51,105.20, 76,661.40 and 28,929.20 is: 43,395.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,105.20 : 76,661.40 = 28,929.20 : x
  2. Step 2: Convert to fraction form
    51,105.20/76,661.40 = 28,929.20/x
  3. Step 3: Cross multiply
    51,105.20x = 76,661.40 × 28,929.20
  4. Step 4: Simplify right side
    51,105.20x = 2,217,752,972.88
  5. Step 5: Solve for x
    x = 2,217,752,972.88/51,105.20
  6. Step 6: Final answer
    x = 43,395.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.